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• delphi windows service can't download file from internet

  - by sam

  hi, i have a windows service written in delphi,the service will use to downloading a file from my website but it can't download the file,it doesn't thrown any exception also i change the destination path and the file to be download but the result was same,my firewall was off too,my project work properly in another PC that i test on it and in windows application my function works properly too, so what should be the problem ? thx for ur time

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• decorating a function and adding functionalities preserving the number of argument

  - by pygabriel

  I'd like to decorate a function, using a pattern like this: def deco(func): def wrap(*a,**kw): print "do something" return func(*a,**kw) return wrap The problem is that if the function decorated has a prototype like that: def function(a,b,c): return When decorated, the prototype is destroyed by the varargs, for example, calling function(1,2,3,4) wouldn't result in an exception. Is that a way to avoid that? How can define the wrap function with the same prototype as the decorated (func) one? There's something conceptually wrong?

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• QLocale, what is the scope of the global QLocale::setDefault()?

  - by ALoopingIcon

  Problem: I have a QT based multiplatform (win,mac,*nix) application that parses ascii files containing decimal numbers. parsing is done using a variety of different code pieces that use anything from qt string stuff, c++ stdin, oldstyle scanf, etc. ascii files have always the '.' (dot) as separated decimal (e.g. in the file to be parsed 1/10 is written 0.1 as standard in many countries). people using the application within a OS localized for using comma separated decimal encounter a lot of problems (e.g. for french users scanf expect to find 0,1 as a valid textual representation of 1/10 and if they find 0.1 scanf will parse it as 0) How can I be sure that the OS Locale indication of how decimal point has to be written is always ignored? Is it safe assuming that adding QLocale::setDefault(QLocale(QLocale::English,QLocale::UnitedStates)); is enough to get rid of all these problems? Any suggestion for portable ways of setting the locale globally?

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• Established javascript solution for secure registration & authentication without SSL

  - by Tomas

  Is there any solution for secure user registration and authentication without SSL? With "secure" I mean safe from passive eavesdropping, not from man-in-the-middle (I'm aware that only SSL with signed certificate will reach this degree of security). The registration (password setup, i.e. exchanging of pre-shared keys) must be also secured without SSL (this will be the hardest part I guess). I prefer established and well tested solution. If possible, I don't want to reinvent the wheel and make up my own cryptographic protocols. Thanks in advance.

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• Using database on another development machine

  - by Cipher

  Hi, I am developing an ASP.NET website. I wanted to shift whole of my work to another PC of mine. I copied the website to the other PCOpenCreate ASP.NET folderApp_Data and pasted the database.mdf and database.ldf files there. I was getting some exception when I was trying to run the website as it showed the "could not open the connection from con.open()". Is there some other step too that I am missing?

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• How to pass non-fatal warnings from a library

  - by wRAR

  A library function parses a file and returns an object. If a parser encounters unknown data, missing values etc., it shouldn't throw an exception and stop parsing (because this is not fatal), but there should be a way to pass information about these things to a caller (so that warnings can be displayed in the UI, for example). How can these warning be returned? I'm thinking of passing a callback function/object into the library, are there any other possible solutions?

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• C# ApplicationContext usage

  - by rd42

  Apologies if my terminology is off, I'm new to C#. I'm trying to use an ApplicationContext file to store mysql conn values, like dbname, username, password. The class with mysql conn string is "using" the namespace for the ApplicationContext, but when I print out the connection string, the values are making it. A friend said, "I'm not initializing it" but couldn't stay to expand on what "it" was. and the "Console.WriteLine("1");" in ApplicationContext.cs never shows up. Do I need to create an ApplicationContext object and the call Initialize() on that object? Thanks for any help. ApplicationContext.cs: namespace NewApplication.Context { class ApplicationContext { public static string serverName; public static string username; public static string password; public static void Initialize() { //need to read through config here try { Console.WriteLine("1"); XmlDocument xDoc = new XmlDocument(); xDoc.Load(".\\Settings.xml"); XmlNodeList serverNodeList = xDoc.GetElementsByTagName("DatabaseServer"); XmlNodeList usernameNodeList = xDoc.GetElementsByTagName("UserName"); XmlNodeList passwordNodeList = xDoc.GetElementsByTagName("Password"); } catch (Exception ex) { // MessageBox.Show(ex.ToString()); //TODO: Future write to log file username = "user"; password = "password"; serverName = "localhost"; } } } } MySQLManager.cs: note: dbname is the same as the username as you'll see in the code, I copied this from a friend who does that. using System; using System.Collections.Generic; using System.Linq; using System.Text; using MySql.Data; using MySql.Data.MySqlClient; using NewApplication.Context; namespace NewApplication.DAO { class MySQLManager { private static MySqlConnection conn; public static MySqlConnection getConnection() { if (conn == null || conn.State == System.Data.ConnectionState.Closed) { string connStr = "server=" + ApplicationContext.serverName + ";user=" + ApplicationContext.username + ";database=" + ApplicationContext.username + ";port=3306;password=" + ApplicationContext.password + ";"; conn = new MySqlConnection(connStr); try { Console.WriteLine("Connecting to MySQL... "); Console.WriteLine("Connection string: " + connStr + "\n"); conn.Open(); // Perform databse operations // conn.Close(); } catch (Exception ex) { Console.WriteLine(ex.ToString()); } } return conn; } } } and, thanks for still reading, this is the code that uses the two previous files: class LogDAO { MySqlConnection conn; public LogDAO() { conn = MySQLManager.getConnection(); } Thank you, rd42

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• deployement of a windows application project

  - by pk

  hi, i have made a project using c# .net windows application . i deployed it also bt wen i install n run it it throws an exception database not faund plz help me

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• How to remove segment at index at 0 of UISegmentcontrol in iphone?

  - by Warrior

  I am able to remove the segment at index 1,2,3 etc but not able to remove the segment at index 0 . [self readGroupFromDatabase]; NSLog(@"the current teble desc count value is %d",[tableDesc count]);---->0 if([tableDesc count]== 0){ [segemntedControl removeSegmentAtIndex:0 animated:NO]; } i am getting this error : *** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[NSCFArray objectAtIndex:]: index (-1( or possibly larger)) beyond bounds (5)' Please help me out.Thanks.

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• How to invoke the getView method in the baseAdapter in Android from another WebService Bean?

  - by greysh

  The adapter in my code as follows, I extends the base adapter: @Override public View getView(final int position, View convertView, ViewGroup parent) { ViewHolder vHolder; // if (convertView == null) { vHolder = new ViewHolder(); convertView = mInflater.inflate(R.layout.home_item, null); vHolder.albumIcon = (ImageView) convertView .findViewById(R.id.albumIcon); try { Bitmap icon = aws.getAlbumImg(itemInfolist.get(position) .getAlbumInfoCol().get(0).getAlbumID(), 0); if (icon != null) { vHolder.albumIcon.setImageBitmap(icon); } else { vHolder.albumIcon.setImageBitmap(BitmapFactory.decodeResource( context.getResources(), R.drawable.album)); } } catch (Exception e) { vHolder.albumIcon.setImageBitmap(BitmapFactory.decodeResource( context.getResources(), R.drawable.album)); } convertView.setTag(vHolder); return convertView; } However, I download the imagine asynchronously, When invoke Bitmap icon = aws.getAlbumImg(itemInfolist.get(position).getAlbumInfoCol().get(0).getAlbumID(), 0); Some pictures which haven't downloaded will use the default image, after these picutures have downloaded in another Web Service Bean, I want the Web Service bean sends a message to invoke the getView method in this adapter in order to implement the auto refresh function. But if I change the Web Service Download Bean as follows,it will cause the exception 03-19 07:46:33.241: ERROR/AndroidRuntime(716): android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. HomeAdapter mHomeAdapter; public AlbumWS(HomeAdapter homeAdapter) { mHomeAdapter = homeAdapter; } And after download, public boolean getAlbumImgWS(final ArrayList albumIDs) { new Thread(new Runnable() { @Override public void run() { // TODO Auto-generated method stub AlbumInfoWS aiws = new AlbumInfoWS(); for (int i = 0; i < albumIDs.size(); ++i) { if (ABSCENTALBUMIMGS.contains(albumIDs.get(i))) { continue; } if (FunctionUtil.isExist(albumIDs.get(i))) { continue; } String urlPath = aiws.getAlbumImage("en_US", Config.IMG_ATTIBUTETYPE, albumIDs.get(i)); boolean ret = FunctionUtil.simpleDownload(Config.HOST + urlPath, "/data/data/com.greysh.amped/img/" + albumIDs.get(i) + ".jpg"); if (!ret) { if (!ABSCENTALBUMIMGS.contains(albumIDs.get(i))) { ABSCENTALBUMIMGS.add(albumIDs.get(i)); } } mHomeAdapter.notifyDataSetChanged(); } } }).start(); return true; }

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• Application crashes while using the scroll bars in winForm Datagrid view

  - by subbu

  Hi all i have a background worker thread and some unmanaged code dlls , In progress changed event of background worker . I will get the data from my database in a datatable and make this table as my DataSource. But when i use the scrollbards od DataGridView my application crashes.when I try to debug the application it gives "Unhandled exception in TestExe.exe : 0xC0000096: Privileged Instruction.

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• html/php: how to handle absolute url's?

  - by YuriKolovsky

  Is the html tag safe to use in terms of browser support? Or should I generate a root path with PHP which i then add like this <a href="<?=BASE?>somepage.html">somepage</a> which makes up a absolute url. using the base tag like this <base href="<?=BASE?>" /> I am then able to use links like this <a href="somepage.html">somepage</a> now I am fully aware that it would be much easier to just do this without using the base tag: <a href="/somepage.html">somepage</a> but how do I test locally then with a base url of http://localhost/testsite/ ???

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• Specify sorting order for a GROUP BY query to retrieve oldest or newest record for each group

  - by Beau Simensen

  I need to get the most recent record for each device from an upgrade request log table. A device is unique based on a combination of its hardware ID and its MAC address. I have been attempting to do this with GROUP BY but I am not convinced this is safe since it looks like it may be simply returning the "top record" (whatever SQLite or MySQL thinks that is). I had hoped that this "top record" could be hinted at by way of ORDER BY but that does not seem to be having any impact as both of the following queries returns the same records for each device, just in opposite order: SELECT extHwId, mac, created FROM upgradeRequest GROUP BY extHwId, mac ORDER BY created DESC SELECT extHwId, mac, created FROM upgradeRequest GROUP BY extHwId, mac ORDER BY created ASC Is there another way to accomplish this? I've seen several somewhat related posts that have all involved sub selects. If possible, I would like to do this without subselects as I would like to learn how to do this without that.

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• Core Data strategy using in memory cache, or no core data at all?

  - by randombits

  I have a user interface where the user can check off a bunch of items from a tableview, almost like a todo list. The items are populated from a Core Data stack. I need to be able to take all of the items they're clicking through and put them into a "temporary" shopping cart. Once they're in the shopping cart, users can go through the list and remove the items, or just submit them to a server. The thing is, the selected items are temporary just like an internet based shopping cart. It's nothing something that gets persisted once the application closes. Once the view is no longer in display, I can assume that the shopping cart is safe to discard. What's the best way to approach this? Since the user is essentially clicking on instances that map back to a Core Data entity .. should I setup a different persistence store such as in memory and add that store to my managed object context?

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• In MVC framworks (such as Ruby on Rails), do usually Model spell as singular and controller and view

  - by Jian Lin

  I usually see Ruby on Rails books using script/generate model Story name:string link:string which is a singular Story, while when it is controller script/generate controller Stories index then the Story now is Stories, which is plural. Is this a standard on Ruby on Rails? Is it true in other MVC frameworks too, like CakePHP, Symfony, Django, or TurboGears? I see that in the book Rails Space, the controller is also called User, which is the same as the model name, and it is the only exception I see.

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• Crashing app when i want to go rootview from other view controller

  - by Priyanka

  Hello All, I want to go Root view Controller from another view controller but i got the terminating error. following is the error message in console, Terminating app due to uncaught exception 'NSRangeException', reason: '* -[NSCFArray removeObjectsInRange:]: index (4) beyond bounds (1)' This is my code for that NSArray *arr=self.navigationController.viewControllers; //ListOfInjuriesViewController *list=[[ListOfInjuriesViewController alloc]init]; [self.navigationController popToViewController:[arr objectAtIndex:2] animated:YES]; So any one can give me the suggestion on it so can remove the crash

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• Get content from HTML element in Rails

  - by Ignace

  Hey, I'm looking for a way to get the content of my div in my Rails view. I would like the literal HTML content, so only HTML and no Rails I thought inner_html would work, but I get a RJS exception (TypeError: $("content").innerHtml is not a function) Does anyone know how I can get the content? Thanks!

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• How do I escape backslashes in JSON?

  - by peteb

  I am using Firefox's native JSON.parse() to parse some JSON strings that include regular expressions as values, for example: var test = JSON.parse('{"regex":"/\\d+/"}'); The '\d' in the above throws an exception with JSON.parse(), but works fine when I use eval (which is what I'm trying to avoid). What I want is to preserve the '\' in the regex - is there some other JSON-friendly way to escape it?

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• UITableView does not scroll to cell

  - by Sheehan Alam

  I am trying to scroll my tableview to the 2nd cell: [self.tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:1 inSection:0] atScrollPosition:UITableViewScrollPositionNone animated:NO]; I get the error: *** Terminating app due to uncaught exception 'NSRangeException', reason: '-[UITableView scrollToRowAtIndexPath:atScrollPosition:animated:]: section (1) beyond bounds (0). ' My tableview has 30 cells that are appearing with no sections.

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• What exactly this error is?

  - by user144842

  Database i am using is MySQL 5.1. I specified, i believe, right connectionstring in my web.config. but when i run my web app. it throws this exception:- MySql.Data.MySqlClient.MySqlException: The user specified as a definer ('root'@'%') does not exist Any help. Why am i getting this?

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• How does the CLR know the type of a boxed object?

  - by fearofawhackplanet

  When a value type is boxed, it is placed inside an untyped reference object. So what causes the invalid cast exception here? long l = 1; object obj = (object)l; double d = (double)obj;

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• Exceptions confusion

  - by Misiur

  Hi there. I'm trying to build site using OOP in PHP. Everyone is talking about Singleton, hermetization, MVC, and using exceptions. So I've tried to do it like this: Class building whole site: class Core { public $is_core; public $theme; private $db; public $language; private $info; static private $instance; public function __construct($lang = 'eng', $theme = 'default') { if(!self::$instance) { try { $this->db = new sdb(DB_TYPE.':host='.DB_HOST.';dbname='.DB_NAME, DB_USER, DB_PASS); } catch(PDOException $e) { throw new CoreException($e->getMessage()); } try { $this->language = new Language($lang); } catch(LangException $e) { throw new CoreException($e->getMessage()); } try { $this->theme = new Theme($theme); } catch(ThemeException $e) { throw new CoreException($e->getMessage()); } } return self::$instance; } public function getSite($what) { return $this->language->getLang(); } private function __clone() { } } Class managing themes class Theme { private $theme; public function __construct($name = 'default') { if(!is_dir("themes/$name")) { throw new ThemeException("Unable to load theme $name"); } else { $this->theme = $name; } } public function getTheme() { return $this->theme; } public function display($part) { if(!is_file("themes/$this->theme/$part.php")) { throw new ThemeException("Unable to load theme part: themes/$this->theme/$part.php"); } else { return 'So far so good'; } } } And usage: error_reporting(E_ALL); require_once('config.php'); require_once('functions.php'); try { $core = new Core(); } catch(CoreException $e) { echo 'Core Exception: '.$e->getMessage(); } echo $core->theme->getTheme(); echo "<br />"; echo $core->language->getLang(); try { $core->theme->display('footer'); } catch(ThemeException $e) { echo $e->getMessage(); } I don't like those exception handlers - i don't want to catch them like some pokemons... I want to use things simple: $core-theme-display('footer'); And if something is wrong, and debug mode is enabled, then aplication show error. What should i do?

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• What does "Contract can't be in try block" mean?

  - by MatthewMartin

  I'm using the 3.5 library for microsoft code contracts public object RetrieveById(int Id) { Contract.Ensures(newObject != null, "object must not be null"); return newProject; //No error message if I move the Contract.Ensures to here //But it isn't asserting/throwing a contract exception here either } I get the compiler message: "Error 18 Contract section within try block in method 'Controller.RetrieveById(System.Int32)'

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• varnish invalidate url REGEX from backend

  - by ooouuiii

  Say I have some highly-visited front-page, which displays number of some items by categories. When some item is added / deleted I need to invalidate this front-page/url and some 2 others. What is the best practice how to invalidate those urls from backend in Varnish (4.x)? From what I captured, I can: implement my HTTP PURGE handler in VCL configuration file, that "bans" urls matching received regex from backend to Varnish, send 3x HTTP PURGE requests for those 3 urls. But is this approach safe for this automatic usage? Basicly I need to invalidate some views everytime some related entity is inserted/updated/deleted. Can it lead to ban list cumulation and increasing CPU consumption? Is there any other approach? Thanks.

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• How to insert a WebView into a cocoa app?

  - by spamoom

  I'm rather new with the whole OSX programming, I wanted to stick a WebView into an empty app. Apparently it isn't as simple as sticking a WebView on a window in interface builder and creating an outlet. IBOutlet WebView *webView; It gives me a expected specifier-qualifier-list before 'WebView' and when I don't use an outlet, it terminates due to uncaught exception. I'm not too sure what these error messages mean. Seems it isn't that simple!

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